<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
          <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
	</head>
	<body>

        <div id="div1">我草泥马</div>



	</body>

    <script>


		$("#div1").append(   "<span>草泥马0</span><br>") ;
		$("#div1").append(   "<span>草泥马1</span><br>") ;

		let text = '';

		for (let i = 0; i <500; i++) {

			  text +='shit \n' ;
		}

		alert(text)

    </script>
</html>
